Bugfix: Remove fuzzy search results

We've had a bug that caused some search results to show up that didn't align with the search term.

https://github.com/owncloud/web/pull/8508
https://github.com/owncloud/web/pull/8863
https://github.com/owncloud/web/issues/8493
https://github.com/owncloud/web/issues/8860